Thermal Characterization of Nanofluids with Different Solvents

Abstract

Thermal lens spectrometry (TLS) and photopyroelectric (PPE) techniques were used to obtain the thermal diffusivity and effusivity of different nanofluid samples. The thermal effusivity of these samples was obtained by the PPE technique in a front detection configuration. In the case of the determination of the thermal diffusivity, TLS was used for the different solvents in the presence of gold nanoparticles (nanofluids). In this technique, an Ar + laser and intensity stabilized He-Ne laser were used as the heating source and probe beam, respectively. The experimental results showed that thermal diffusivity values of the studied solvents (water, ethanol, and ethylene glycol) were enhanced by the presence of gold nanoparticles. Comparisons with literature values show good agreement with pure solvents. These techniques are applicable for all kind of liquid samples, including semitransparent ones.

Co3O4 ethylene glycol-based nanofluids: Thermal conductivity, viscosity and high pressure density

“…The atypical increases in properties such as thermal conductivity or viscosity is related with the system scale, determined by the size, nature, and state of aggregation of the particles in suspension, among other variables, and do not depend only on its chemical nature. This behaviour has been reported in literature for nanofluids derived from metallic nanoparticles, nanoparticles derived from metal oxides, ceramics, or carbon nanotubes [1][2][3][4][5][6][7][8][9].…”

An Investigation on the Thermal Effusivity of Nanofluids Containing Al2O3 and CuO Nanoparticles

“…The thermal effusivity of EG and olive oil also are close to the literature values reported for pure solvents [21]. Therefore the FPE configuration can be considered reasonably reliable to measure this thermal parameter.…”

Thermal diffusivity measurement for urchin-like gold nanofluids with different solvents, sizes and concentrations/shapes

“…In addition, local electromagnetic field enhancement at the tips of branched particles and thermal conductivity enhancement make these materials a candidate for application in electromagnetic hyperthermia therapy [3,4]. Thermal studies of nanofluids have mainly focused on thermal conductivity measurements, but recently, other techniques have been developed for thermal diffusivity measurements in nanofluids, such as the hot-wire technique and thermal lens spectrometry [5-7]. …”